.longbo{
    width: 1184px;
    height: 380px;
    background-color: aquamarine;
    margin: 0 auto;
    position: relative;
}
.middle_left{
    float: left;
    height: 100%;
    width: 184px;
    background-color: #91776e;
    position: relative;
    z-index: 20000;
}
.middle_left>li{
    margin: 18px 0 0 18px;
    /* position: relative; */
}
.middle_left>li>div{
    width: 500px;
    /* height: 460px; */
    background-color:white;
    color:gray;
    display: none;
    z-index: 1000;
    padding: 0 20px;
}
.middle_left>li .div1{
    position: absolute;
    left:185px ;
    top: 1px;
}

.middle_left>li .div2{
    position: absolute;
    left:185px ;
    top: 50px;
}
.middle_left>li .last{
    position: absolute;
    left:185px ;
   bottom: 0px;
}
.middle_left>li .div3{
    position: absolute;
    left:185px ;
    top: 120px;
}
.middle_left>li .div4{
    position: absolute;
    left:185px ;
    top: 220px;
}
.middle_left>li .div5{
    position: absolute;
    left:185px ;
    top: 420px;
}
.middle_left>li:hover div{
    display: block;
}
.middle_left>li .span{
    display: block;
    font-size: 14px;
}
.middle_left>li>div ul{
    height: 50px;
    border-top: 1px solid #f0f3ef;
}
.middle_left>li>div ul li{
    float: left;
    line-height: 50px;
    padding: 0 10px 0 10px;
    background: url(../img/gang.jpg) no-repeat 1px;
}
.middle_left>li>div ul .list{
    padding: 0 25px 0 15px;
    width: 60px;
    font-weight: bold;
    background: none;
}
.middle_right{
    float: right;
    width: 1000px;
    height: 100%;
    position: relative;
    background-color: rgb(6, 212, 240);
}
#prev,#next{
    position:absolute;
    top:45%;
    cursor:pointer;
    opacity:.7;
    transition:all .5s;
}
#prev:hover,#next:hover{
    opacity:1;
    transform: scale(1.1)
}

#prev{
    /* position: absolute; */
    left:0px;
}
#next{
    right:0px;
}


.tushuList{
    width: 1180px;
    height: 520px;
    background-color:#f0f3ef;
    margin: 0 auto;
    margin-top: 20px;
}
.tushuList .tushu_left{
    height: 510px;
    width: 870px;
    float: left;
    background-color: brown;

}

.tushu_left .dl{
    width: 870px;

    float: left;
    background-color: white;
    /* margin-top: 18px; */

}
.tushu_left p{
    line-height: 30px;
    text-indent: 20px;
}
.tushu_left .dl dl{

    float: left;
    margin: 13px;
    margin-top: 0px;
    margin-left: 33px;
}
.tushuList #tushuList_right{
    height: 520px;
    width:300px;
    background-color: white;
    float: right;
    /* margin-top: 18px; */
}